<template>
  <div class="login_container">
    <div class="login_box">
        <!-- 头像区域 -->
        <div class="avator_box">
            <img src="../assets/logo.png" alt="">
        </div>
        <!-- 登录表单区域 -->
        <el-form class="login_form" ref="loginFormRef" :model="loginForm" :rules="loginFormRules">
            <!-- 用户名 -->
            <el-form-item prop="username">
                <el-input prefix-icon="iconfont icon-users" v-model="loginForm.username"></el-input>
            </el-form-item>
            <!-- 密码 -->
            <el-form-item prop="password">
                <el-input type="password" prefix-icon="iconfont icon-3702mima" v-model="loginForm.password"></el-input>
            </el-form-item>
            <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
        </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
    // 表单数据绑定对象
      loginForm: {
        username: 'admin',
        password: 123456
      },
      // 表单验证规则对象
      loginFormRules: {
        //   验证用户名合法性
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        //   验证密码合法性
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 5, max: 15, message: '长度在 5 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm: function() {
      console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login: function() {
      // validate 返回一个布尔值valid  验证通过--true  验证不通过--false
      this.$refs.loginFormRef.validate(async valid => {
      // console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('登录失败！')
        this.$message.success('登录成功！')
        // 1.登录成功后将token保存到客户端的sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航跳转到后台主页，路由地址为 /home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
    .login_container {
        background-color: #4b6b8b;
        height: 100%;
    }
    .login_box {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
    }
    .avator_box {
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        background-color: #fff;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
    .login_form {
        position: absolute;
        bottom: 0px;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
        .btns {
            float: right;
        }
    }
</style>
